Hi,
I'm trying to write a plugin, that gets into action, whenever the user moves
or zooms the main map. I found the QgsMapCanvas::emitExtentsChanged() signal.
This is probably exactly, what I need. But I don't know, how to "catch" this
signal. I guess, this is somehow done with pyqtSignals, but I don't understand
how...
I found a tutorial (1) which explains how to use pyqtSignal with self defined
signals. I think I got this. But now I need to catch a signal which is defined
in the library. How to connect to this signal?
>From what I understand, my code should be something like:
def __init__():
# with some pyqtSignal xxx:
xxx.connect(my_fun)
def my_fun(some parameters?):
# code to execute when extents changed
So two question remain:
a) What is xxx above?
b) Does "my_fun" need some parameters?
Any help is appreciated!
Thanks, Bernhard
(1) https://gis-ops.com/qgis-3-plugin-tutorial-pyqt-signal-slot-explained/
--
Bernhard Seckinger <[email protected]>
_______________________________________________
QGIS-User mailing list
[email protected]
List info: https://lists.osgeo.org/mailman/listinfo/qgis-user
Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
